feat(多人游戏): 添加连接状态检查和断开连接功能

- 在MultiplayerState中添加isConnected方法检查连接状态
- 修改launchServer和connectClient方法以更新连接状态
- 在Starter面板中添加断开连接按钮并实现状态同步
- 更新UI显示连接状态和颜色

components/Scenes/FullscreenPanels/Starter.tscn

@@ -88,9 +88,10 @@ label_settings = SubResource("LabelSettings_lfxcn")
 
 [node name="connectionState" type="Label" parent="content/wrapper/starter/multiplayer/main" index="1"]
 unique_name_in_owner = true
+modulate = Color(1, 0, 0, 1)
 layout_mode = 2
 size_flags_horizontal = 4
-text = "状态："
+text = "状态：未连接到服务器。"
 label_settings = SubResource("LabelSettings_kl3ko")
 
 [node name="host" type="HBoxContainer" parent="content/wrapper/starter/multiplayer/main" index="2"]
@@ -145,6 +146,13 @@ layout_mode = 2
 size_flags_horizontal = 4
 text = "连接服务器"
 
+[node name="disconnectBtn" type="Button" parent="content/wrapper/starter/multiplayer/main/operation" index="2"]
+unique_name_in_owner = true
+layout_mode = 2
+size_flags_horizontal = 4
+disabled = true
+text = "断开连接"
+
 [node name="serverConfig" type="VBoxContainer" parent="content/wrapper/starter/multiplayer" index="1"]
 layout_mode = 2
 alignment = 1

scripts/Contents/Panels/Starter.gd

@@ -10,6 +10,7 @@ extends FullscreenPanelBase
 @onready var connectBtn: Button = $"%connectBtn"
 @onready var maxPlayerInput: LineEdit = $"%maxPlayerInput"
 @onready var connectionState: Label = $"%connectionState"
+@onready var disconnectBtn: Button = $"%disconnectBtn"
 
 func _ready():
 	diffEdit.min_value = GameRule.difficultyRange.x
@@ -36,3 +37,4 @@ func setState(state: MultiplayerState.ConnectionState):
 	MultiplayerState.state = state
 	connectionState.text = "状态：%s" % MultiplayerState.stateTextMap[state]
 	connectionState.modulate = MultiplayerState.stateColorMap[state]
+	disconnectBtn.disabled = not MultiplayerState.isConnected()

scripts/Tools/Managers/MultiplayerState.gd

@@ -25,8 +25,15 @@ static var isMultiplayer: bool = false
 
 static var maxPlayer: int = 10
 
+static func isConnected():
+	return [ConnectionState.CONNECTED_HOST, ConnectionState.CONNECTED_CLIENT].has(state)
 static func launchServer(port: int):
-	isMultiplayer = true
 	var peer = ENetMultiplayerPeer.new()
 	peer.create_server(port, maxPlayer)
+	state = ConnectionState.CONNECTED_HOST
+	return peer
+static func connectClient(host: String, port: int):
+	var peer = ENetMultiplayerPeer.new()
+	peer.create_client(host, port)
+	state = ConnectionState.CONNECTED_CLIENT
 	return peer